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Chop the tomatoes coarsely. Chop the olives finely. Crush the garlic.
Heat the oil in a saucepan. Add the tomatoes, olives, garlic, oregano and pepper. Simmer uncovered over a low heat for about 15 minutes, stirring occasionally. Add the parsley and cook for 2 minutes longer.
Meanwhile, cook the spaghetti, and when it is ready, drain it and pour the sauce over it.
posted by Mr Falafel